Clunk from rear after shutting engine off

Tiny
JCHH
  • MEMBER
  • 2018 HONDA CIVIC
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 24,000 MILES
Hi all, so i have been hearing this noise from the rear of my car after driving, once the engine is warm. It occurs about 1-2 minutes after shutting the engine off, and it’s pretty loud. Does anyone know where this sound could be coming from?

Here is a video of the sound:

Inside car:
https://youtu.be/3SdJMGMovzk

Outside car (0:09):
https://youtu.be/SVVA6sDSkpg
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Friday, February 14th, 2020 AT 10:41 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

I listened to both videos and to be honest, I never heard one do that before. Is it louder on one side than the other? Does it ever seem that one of the brakes could be sticking? Does it do it every time?

Let me know.
Joe
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Friday, February 14th, 2020 AT 1:25 PM
Tiny
JCHH
  • MEMBER
Thank you for your response. I guess it s a tiny bit louder on the driver side? Not by much at all though. Also no, brakes are perfectly fine, as with everything else.

I think it only occurs when the engine is cold, happens to me about twice a day during my morning commute, but not on my commute home (3 hours later), and happens again once I head out during the night. Seems to be related to temperature.

I actually emailed the dealer with the same audio clips and they seem to think it s either the catalytic converter cooling down or a loose heat shield by the fuel tank cooling down.

I will update once I have it inspected, thanks!
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Wednesday, February 19th, 2020 AT 5:37 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

I have to agree. It sounds like something cooling down. Steel expands when hot and contracts when cooling. I guess that could be an issue.

Let me know.

Joe
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Wednesday, February 19th, 2020 AT 8:29 PM

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